升级Vue3，iView替换ElementPlus

- 删除babel配置、更新依赖与入口初始化
- 全量替换UI组件、样式适配，新增迁移文档与标签/过滤器自动化替换脚本

buyer/src/utils/iconMap.js

@@ -0,0 +1,83 @@
+import {
+  Check,
+  Close,
+  Delete,
+  Plus,
+  ArrowDown,
+  ArrowUp,
+  ArrowRight,
+  ArrowLeft,
+  ShoppingCart,
+  Camera,
+  View,
+  Warning,
+  Help,
+  Edit,
+  InfoFilled,
+  User,
+  Lock,
+  Iphone,
+  Search,
+  Document,
+  Refresh,
+  Link,
+  Key,
+  AlarmClock,
+  Location,
+  Star,
+  StarFilled,
+  CircleClose,
+  ShoppingCartFull,
+  Tickets,
+  PriceTag,
+  Money,
+} from "@element-plus/icons-vue";
+
+/** 旧 iView type 字符串 → Element Plus 图标组件 */
+export const ICON_MAP = {
+  "md-checkmark": Check,
+  "md-close": Close,
+  "md-trash": Delete,
+  "md-add": Plus,
+  "md-arrow-dropdown": ArrowDown,
+  "md-arrow-dropup": ArrowUp,
+  "md-person": User,
+  "md-lock": Lock,
+  "md-phone-portrait": Iphone,
+  "md-key": Key,
+  "md-link": Link,
+  "md-refresh": Refresh,
+  "ios-arrow-down": ArrowDown,
+  "ios-arrow-up": ArrowUp,
+  "ios-arrow-forward": ArrowRight,
+  "ios-arrow-back": ArrowLeft,
+  "ios-arrow-round-down": ArrowDown,
+  "ios-arrow-round-forward": ArrowRight,
+  "ios-cart-outline": ShoppingCart,
+  "ios-camera": Camera,
+  "ios-eye-outline": View,
+  "ios-trash-outline": Delete,
+  "ios-alert-outline": Warning,
+  "ios-help-circle-outline": Help,
+  "ios-add-circle-outline": Plus,
+  "ios-information-circle": InfoFilled,
+  "ios-search": Search,
+  "ios-text-outline": Document,
+  "ios-alarm-outline": AlarmClock,
+  "md-qr-scanner": Iphone,
+  edit: Edit,
+  "trash-a": Delete,
+  location: Location,
+  "ios-heart": StarFilled,
+  "md-close-circle": CircleClose,
+  "ios-cart": ShoppingCartFull,
+  "md-clipboard": Tickets,
+  "md-pricetag": PriceTag,
+  "logo-usd": Money,
+  "ios-eye": View,
+  "md-star": Star,
+};
+
+export function resolveIcon(type) {
+  return ICON_MAP[type] || InfoFilled;
+}